:root {
  --bg: #08111d;
  --bg-soft: #0d1726;
  --panel: rgba(14, 23, 38, 0.82);
  --panel-2: rgba(18, 30, 49, 0.9);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(126, 167, 214, 0.25);
  --text: #edf3fb;
  --muted: #a8b8cc;
  --accent: #7dd3fc;
  --accent-2: #93c5fd;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.34);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(125, 211, 252, 0.06), transparent 24%),
    radial-gradient(circle at bottom right, rgba(147, 197, 253, 0.06), transparent 24%),
    linear-gradient(135deg, var(--bg), var(--bg-soft));
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.bg-pattern {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.25;
  mask-image: radial-gradient(circle at center, black 35%, transparent 95%);
  pointer-events: none;
  z-index: 0;
}

.bg-accent {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}

.bg-accent-1 {
  width: 280px;
  height: 280px;
  background: #38bdf8;
  top: 90px;
  right: -50px;
}

.bg-accent-2 {
  width: 260px;
  height: 260px;
  background: #2563eb;
  bottom: 60px;
  left: -40px;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  padding-top: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-size: clamp(2rem, 3vw, 2.7rem);
  font-weight: 800;
  letter-spacing: 0.06em;
}

.subtitle {
  color: var(--muted);
  font-size: 0.98rem;
}

.yt-link {
  text-decoration: none;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 12px 16px;
  transition: 0.2s ease;
}

.yt-link:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.main-content {
  padding: 28px 0 42px;
}

.hero-card,
.card,
.mini-card {
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-card {
  border-radius: var(--radius-xl);
  padding: 34px 30px;
  margin-bottom: 22px;
}

.hero-label {
  display: inline-block;
  border-radius: 999px;
  padding: 8px 14px;
  margin-bottom: 16px;
  background: rgba(125, 211, 252, 0.08);
  border: 1px solid rgba(125, 211, 252, 0.18);
  color: #dff6ff;
  font-size: 0.88rem;
}

.made-by {
  margin: 0 0 10px;
  color: var(--muted);
}

.hero-card h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  max-width: 860px;
}

.hero-text {
  margin: 0;
  color: var(--muted);
  max-width: 760px;
  line-height: 1.72;
  font-size: 1.03rem;
}

.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.hero-tags span {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.9rem;
}

.grid {
  display: grid;
  gap: 20px;
}

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 20px;
}

.three-col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border-radius: var(--radius-xl);
  padding: 24px;
}

.card-header h2,
.mini-card h3 {
  margin-top: 0;
}

.card-header p,
.mini-card p {
  color: var(--muted);
  line-height: 1.65;
}

.chooser-box {
  background: var(--panel-2);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-top: 18px;
}

.chooser-label {
  display: block;
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 10px;
}

.chooser-select {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 15px 16px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: 0.2s ease;
}

.chooser-select:focus {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px rgba(125, 211, 252, 0.08);
}

.enter-btn {
  width: 100%;
  margin-top: 14px;
  border: none;
  border-radius: var(--radius-md);
  padding: 15px 16px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  color: #06121d;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  transition: 0.2s ease;
}

.enter-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(125, 211, 252, 0.16);
}

.enter-btn:active {
  transform: translateY(0);
}

.mini-card {
  border-radius: var(--radius-lg);
  padding: 20px;
}

.mini-link {
  display: inline-block;
  margin-top: 12px;
  text-decoration: none;
  color: white;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  padding-bottom: 2px;
}

.mini-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.site-footer {
  padding: 0 0 28px;
}

.footer-inner {
  text-align: center;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.footer-inner a {
  color: var(--accent);
  text-decoration: none;
}

@media (max-width: 900px) {
  .two-col,
  .three-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 20px));
  }

  .hero-card {
    padding: 24px 18px;
    border-radius: 22px;
  }

  .card,
  .mini-card {
    padding: 18px;
    border-radius: 20px;
  }
  .quick-start {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}

.quick-card {
  display: block;
  text-decoration: none;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: 0.22s ease;
}

.quick-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
}

.quick-card.primary {
  background:
    linear-gradient(135deg, rgba(125, 211, 252, 0.11), rgba(147, 197, 253, 0.08)),
    var(--panel);
  border-color: rgba(125, 211, 252, 0.22);
}

.quick-kicker {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}

.quick-card h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.quick-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.quick-cta {
  display: inline-block;
  margin-top: 14px;
  font-weight: 700;
  color: #dff6ff;
}

@media (max-width: 900px) {
  .quick-start {
    grid-template-columns: 1fr;
  }
}

  .hero-card h1 {
    font-size: 2rem;
  }
}